The 40-year-old actress, who already has two daughters, Ripley, 12, Nico, 8 with Parker is now pregnant with third child, reported Us magazine.
"She couldn't be more happy. You can barely tell she has a bump and she's been dressing different because of it," a source said.
The actress attended the the premiere of her new movie at the Toronto International Film Festival in a figure-hugging monochrome dress with no visible sign of a baby bump.